Journal
JOURNAL OF ASIAN CERAMIC SOCIETIES
Volume 5, Issue 3, Pages 357-363Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1016/j.jascer.2017.06.009
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Funding
- JSPS [26800182]
- MEXT Element Strategy Initiative
- Grants-in-Aid for Scientific Research [26800182] Funding Source: KAKEN
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We report the single crystal growth and characterization of the highest T-c iron-based superconductor SmFeAsO1-xHx. Some sub-millimeter-sized crystals were grown using the mixture flux of Na3As + 3NaH + As at 3.0 GPa and 1473 K. The chemical composition analyses confirmed 10% substitution of hydrogen for the oxygen site (x = 0.10), however, the structural analyses suggested that the obtained crystal forms a multi-domain structure. By using the FIB technique we fabricated the single domain SmFeAsO0.9H0.10 crystal with the Tc of 42 K, and revealed the metallic conduction in in-plane (rho(ab)), while semiconducting in the out-of-plane (rho(c)). From the in-plane Hall coefficient measurements, we confirmed that the dominant carrier of SmFeAsO0.9H0.10 crystal is an electron, and the hydride ion occupied at the site of the oxygen ion effectively supplies a carrier electron per iron following the equation: O2- -> H- + e(-). (C) 2017 The Ceramic Society of Japan and the Korean Ceramic Society. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
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